white house press secretary jay carney said it's highly likely that syrian president assad's regime bought the rebel opposition was behind any chemical weapons used in syria. he took questions on several topics at today's white house briefing. you can see his remarks in their entirety on our web site, c-span.org and here is some of what he said. >> it is very important that we establish conclusively the evidence about chemical weapons use in syria and that includes who used it and under what circumstances and where. having said that it is also our position and that is why the investigation continues and that is why we are working we are working with both the united nations and through other means to gather evidence. separate from math or related to that is the fact that we are highly skeptical of any suggestions or accusations by the opposition to use chemical weapons. we find it highly likely that chemical weapons if they were in fact used in syria and there is certainly evidence that they were, that the assad regime was responsible. but to the point of your question about why we need to